From Wikipedia: "The Lexicon of Comicana is a 1980 book by the American cartoonist Mort Walker. It was intended as a tongue-in-cheek look at the devices used by comics cartoonists. In it, Walker invented an international set of symbols called symbolia after researching cartoons around the world (described by the term comicana). In 1964, Walker had written an article called "Let's Get Down to Grawlixes", a satirical piece for the National Cartoonists Society. He used terms such as grawlixes for his own amusement, but they soon began to catch on and acquired an unexpected validity. The Lexicon was written in response to this."

the Lexicon was written in 1980, and has been out of print for many years. In 2000 it was reprinted by backinprint.com, but this edition is also out of print. Both versions are difficult to get ahold of these days. This scan of the backinprint.com edition was uploaded to make it accessible to those that just want to read it.